Nut-lock.



lcorresponding V-shaped recess, 4.

WILLIAM .TACOBUS, OF PATERSON, NEW JERSEY.

NUT-LOCK.

Specification of Letters Patent,

Patented July 6, 1909.

Application :filed October 16, 190B. Serial No. 458,054.

To all whom it may concern:

Be it known that I, WiLLIAM JAooBUs, a citizen of the United States, and aresident ot' Paterson, in the county of Passaic and State of New Jersey, have invented `certain new and useful Improvements in Nut-Locks,

ofwliieh the following is a specification.

This invention relates to improvements in nut locks.

In the drawings r-Figure l is a plan view of a nut and bolt having applied thereto this invention. Fig. 2 is a lvertical section of the construction shown in Fig. l. Fig. 3 is a detail view in isometrical perspective of the locking member.

The object which this invention has most particularly in View is to provide a nut lock, which. will serve efficiently as a lock, and which may also be readily placed in the posis tion in which the `lookin member is thrown ont of engagement, an in which osition the nut may be shipped with thev ocking member in position.

The locking member consists of the V-shaped piece, 2. To receive the locking member, 2, the nut, 3, is provided with a The spread end of the V-shaped recess is larger than the spread end of the locking member, 2. The contracted end of the locking member, 2, restsin the contracted end of the recess, l-. In the side of the locking member, 2, and extending lengthwise thereof is a half-round groove, 5. The side of the .V-sha ed recess, 41, is likewise provided with a hal -round groove, 6. These grooves are placed the one opposite the other, and are designed toY receive the pin, 7. When this I pin is driven between the wall Vof the recess,

4, and the wall of the locking member, 2, and into the grooves, 5 and 6, the ell'ect is to force the member, 2, against the' opposite wall of the recess, and to retain it in that position. The pin, 7, will also revent the said member from fall-ing out o' the recess, 4. If the pin, 7, is made of soft material it mayibe easily enlarged by swaging ,from

either the top or bottom. Also, for the pnrposeof shipment, the ends of the pin, 7, may be slightly riveted. This riveting would be sutticientto prevent the pin, 7, from falling` out of the grooves, 5 and 6, and out of the recess, 4, but not such as to prevent the pin bein driven out by using a suitable nail or smal steel rod.

The spread end of the V-shaped member,

the same pitch as is the nut. The segmental threads, 8, are formed to the same curve as the .thread in the nut, when the locking member, 2, is held inthe position shown in Fig. l.' The A'position shown in F ig. l is what is termed the unlocked position, and in this thevthreads in the locking member, 2, register perfectly with the threads of the nut. The thread of the nut matches in pitch and height the thread of the bolt, on which it is to be screwed. The top of the thread of the bolt, therefore, rides in the bottom of the thread of the nut, and also in the bottom r2, is provided with segmental threads, 8, of i of the thread of the locking member, 2. The

thread of the locking member, 2, is cut away from the locking edge of the'member as shown. This cut is optional, but preferred by me for Vthe reason that there is avoided the friction on the sides of the threads where they lift out of engagement in action, which friction might hold the member, 2 in line and prevent its rocking to lock; or re'- tard the rocking action.

As long as the pin, 7, is retained in position as is shown in Fig. l, the member, 2, remains on the bolt as a part of the inner wall of the nut. When, however-,the pin, 7, is withdrawn, then any-movement of the n-ut or bolt in the reverse, or unscrewing, direction immediately causes the locking member, 2, to rock on the sharp or contracted end thereof. The length of the side, 8, of the looking member, 2, is longer than the dimen sion taken on a line through the cent-er of. the contracted end oit the member, 2, and the center of the bolt, and where the said line passes through the member, There fore in rocking as stated the longer dimension acts to jam the edge of the sido, 8, into.

the crown and sides oit' the thread on the bolt,and by so doing to arresti the movement of the bolt or nut in the unlocking direction. This engagement of theside, S, is with the entire edge of the segmental threads.` That is on the crown and sides and bottom of the thread.

. Vhen a nut provided with a locking me1nber constructed as herein described has been screwed on to a bolt, it may be withdrawn readily and easily by driving a pin, 7, or a nail,/or even a wedge of wood between-the grooves, 5 and 6, thereby forcing the locking member, 2, into the unlocked position, as shown in Fig. l. When the lookin"- member, 2 is in this position the nut may be readily l claimed.

1. A nut look comprising a V-'shaped locking member the spread end of which is shaped to the curve of the boltI and threaded to re ister therewith, said member being provi ed in the side with a vertical groove; a nut having aV-shaped recess the spread end of which is larger than the spread end of the said'loeking member; and having a vertical groove formed in the side wall to register with the said groove in the looking member.

2. A nut look -comprising a triangular looking member adapted to pivot on one of the angles' of the triangle and having segmental threads formed in one side of the triangle said threads being formed to the curve of the nut carrying the looking member; a nut adapted to be screwed on a bolt and have ing a recess to hold the said looking member; and a groove formed in the abutted faces of the nut and the side of the said locking 1nember, said grooves adapted to hold a key to release the locking member.

Signed at New York in the county of New York and State of New York this 12th day of October. A. D. 1908.

WILLIAM JACOBUS.

Witnesses:

E. F. MURDOCK, DANIEL. DEV. HARNED. 

